CN218148132U - Side slope protection structure - Google Patents

Abstract

The utility model discloses a side slope protective structure, frame roof beam (4) on the side slope, characterized by, the crossbeam longeron of frame roof beam is placed on the side slope of flattening, is equipped with flat bed (7) of packing in the side slope pit of frame roof beam below, pre-buried L type tooth wall (2) of frame roof beam bottom, border stone (8) are connected to frame roof beam top, is equipped with filling layer (3) in the lattice at frame roof beam middle part, and the filling layer is run through to the level of drain pipe (5), and its inner end extends to flat bed of packing, and outside its outer end extended to the filling layer, the other gutter (9) that is equipped with of border stone. The filling and leveling layer (7) is a sand and gravel filling layer or a broken stone filling layer or a mixed filling layer of the sand and gravel filling layer and the broken stone filling layer. The filling layer compaction factor is not less than 0.9. The filling layer (3) is a gelled sand-rich gravel filling layer, and the filling layer is flush with the surface of the sash beam. The drain pipe (5) is a PVC pipe, and the inner diameter of the drain pipe is 7.5cm.

Description

Side slope protection structure

Technical Field

The utility model relates to a hydraulic engineering, especially a side slope protective structure.

Background

It is known that downstream coastal areas of hydropower stations often have torrential water flow, and the torrential water flow can scour and damage coastal slopes, especially during gate opening flood discharge and power generation. In order to reduce the damage caused by water flow scouring, slope protection is often built on the side slope, so that direct impact of water flow on the soil side slope is isolated, and water and soil loss is prevented.

As shown in the attached figure 1, when the water flow of the jialing river is washed along the bank, the slope protection is usually performed in a concrete frame beam and three-dimensional ecological bag mode in the prior art, and the same is true in the standing process: leveling a soil slope, excavating and pouring a C20 concrete anti-impact tooth wall 1-2 at the bottom of the side slope, arranging lattice beams on the inclined slope at the rear part of the tooth wall, backfilling the front part of the tooth wall by using spoil to form a spoil backfilling area 1-1, backfilling the rear part of the tooth wall by using sand and pebbles to form a sand and pebble backfilling area 1-3, sequentially arranging a leveling layer 1-8, a geotechnical cloth layer 1-7, a thick sand cushion layer 1-6 and a three-dimensional ecological bag layer 1-5 in a lattice 1-4 between the lattice beams from bottom to top, and arranging a curb stone slab 1-9 poured with C20 concrete at the top of the lattice beams. This scheme benefit can protect the side slope to a certain extent, and utilizes three-dimensional ecological bag cooperation grass seed can grow out green vegetation, and the plant is more harmonious with the surrounding environment after side slope protective structure forms, also comparatively pleasing to the eye. The defects found by the operation practice are as follows: 1. the protection capability is not strong, the method is only suitable for slope protection in areas with small flow, the river basin of Jialing river has large rainfall amount, large flood flow and high water flow rate in summer every year, in addition, the hydropower station flood discharge and power generation water flow scouring are carried out, the three-dimensional ecological bag is scoured only for less than 2 years, and the bottom soil can be seen by naked eyes in part of the frame lattice beams; 2. the cost is higher, and the manual bagging cost of the three-dimensional ecological bag is higher.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a stable in structure, scour protection are effectual, the lower side slope protective structure of cost. The specific technical scheme is as follows:

the utility model provides an at side slope protective structure, include and pour the scour protection dentate wall at the toe of a slope, then concreting frame roof beam on the side slope of flattening, curb is connected at frame roof beam top, be equipped with rich gelatinization sand gravel filling layer in the lattice at frame roof beam middle part, bury the drain pipe underground in the filling layer on the side slope, the level runs through the filling layer, its inner end extends to and fills the flat bed, outside its outer end extends to the filling layer, as the effect of rainwater and groundwater in the discharge side slope, the other catch basin that is equipped with of side slope top surface curb.

The filling and leveling layer is a sand and pebble filling layer or a broken stone filling layer or a mixed filling layer of the sand and pebble filling layer and the broken stone filling layer. The filling layer compaction coefficient is not less than 0.9.

The filling layer is a gelled sand-rich gravel filling layer. The filling layer is flush with the surface of the sash beam.

The drain pipe is a PVC pipe, and the inner diameter of the drain pipe is 7.5cm. The inner end of the drain pipe is wrapped with geotextile. The outer end of the drain pipe is lower than the inner end, and the gradient is 2%.

The top of the frame lattice beam can be integrally formed with the kerbstone.

The water passing area of the intercepting ditch is 0.4 x 0.4m. And a 2cm thick mortar surface layer is arranged on the bottom surface and the inner wall of the intercepting ditch.

The technical scheme has the following effects:

1. because the top is provided with the intercepting ditch, when strong precipitation occurs, the flowing water at the high position is drained to the slope toe at the tail end of the side slope by the intercepting ditch when passing through the intercepting ditch, so that a large amount of water flow impact from the top is reduced. Meanwhile, the kerbstone, the sash beams and the catch basins are compact in structure, so that the infiltration of running water at the top to the slope is greatly reduced, loose expansion of soil caused by soaking in a large amount of running water is prevented, and deformation of the sash beams is avoided;

2. according to the scheme, when the slope surface is leveled, the slope surface pits are directly filled and leveled by utilizing the sand pebbles or the broken stones so as to support the sash beams, firstly, the construction is easier, the sand pebbles and the broken stones can be found everywhere along the bank at the edge of a river, and the sand pebbles and the broken stones can be directly adopted, so that the purchase cost and the transportation cost of materials are reduced; secondly, the structure is more stable, the sand pebbles and the broken stones are filled and compacted, the structure is ensured to be stable, and meanwhile, the water permeable effect is good, flowing water flows out of the water discharge pipe in time through gaps between the sand pebbles and the broken stones, loose expansion of soil caused by water accumulation in a slope is avoided, and the inner end of the water discharge pipe is wrapped with geotechnical cloth, so that pipeline blockage can be prevented; thirdly, the filling mode of filling the soil at a high position into the pit by using the excavator is easy to collapse, the slope per se has certain stability and waterproofness after long-time sedimentation, and a more stable supporting effect can be provided;

3. the protective structure adopts in-situ material selection in a large number, reduces the transportation cost of materials, and particularly has more obvious advantages in areas with poor transportation conditions and difficult temporary road land acquisition construction.

Drawings

Fig. 1 is a schematic view of a slope protection structure in a concrete lattice beam and three-dimensional ecological bag mode in the prior art;

fig. 2 is a schematic structural diagram of the present invention.

Description of reference numerals: 1-1 spoil backfill area, 1-2 tooth walls, 1-3 sandy gravel backfill area, 1-4 latticed structure, 1-5 three-dimensional ecological bag layer, 1-6 thick sand cushion layer, 1-7 geotextile layer, 1-8 leveling layer, 1-9 curb stone platform, 2L type base, 3 filling layer, 4 frame lattice beam, 5 drain pipe, 6 geotextile, 7 leveling layer, 8 curb stone, 9 cut-off ditch and 10 grouted block stone.

Detailed Description

Embodiment 1, see fig. 2, a side slope protection structure, including the sash roof beam 4 on the side slope, characterized by, the crossbeam longeron of sash roof beam places on the side slope of flattening, is equipped with flat bed 7 in the side slope pit below the sash roof beam, and pre-buried L type tooth wall 2 of sash roof beam bottom, and curb 8 is connected at the sash roof beam top, is equipped with filling layer 3 (rich gelatinization gravel layer) in the lattice in sash roof beam middle part, and the level of drain pipe 5 runs through the filling layer, and its inner end extends to flat bed, and its outer end extends to outside the filling layer, the curb other cut-off ditch 9 that is equipped with.

The filling layer 7 is a sand-gravel filling layer or a broken stone filling layer or a mixed filling layer of the sand-gravel filling layer and the broken stone filling layer. The filling layer compaction factor is not less than 0.9.

The filling layer 3 is a gelled sand and gravel rich filling layer. The filling layer is flush with the surface of the sash beam.

The drain pipe 5 is a PVC pipe, and the inner diameter of the drain pipe is 7.5cm. The inner end of the drain pipe is wrapped with geotextile 6. The outer end of the drain pipe is lower than the inner end, and the gradient is 2%.

The top of the frame lattice beam and the kerbstone are integrally formed.

The water passing area of the intercepting ditch is 0.4 x 0.4m. And a mortar surface layer with the thickness of 2cm is arranged on the bottom surface and the inner wall of the intercepting ditch.

The filling layer can be filled with the rich gelled sand gravel, and is formed by adopting original state sand gravel originally existing at the Jiangling edge or the beach, removing cobbles with the grain diameter larger than 15CM, adding a certain amount of gelled material (mainly cement) and water, and determining the using amounts of the cement and the water through a mixing ratio test, so that the strength of a test block of the rich gelled sand gravel after stirring reaches the strength of a test block of C15 concrete, adding the gelled material and the water according to the mixing ratio test data during construction, fully stirring and filling the mixture into a concrete frame lattice beam, vibrating and compacting the concrete to form a complete side slope protection structure. The novel slope protection device has the characteristics of stable structure and low cost, the reason is that undisturbed sand and pebbles on the river sides and the beach are selected, the cost of raw materials is very low, the transportation cost is also very low, the amount of cement added is determined to be lower than that of cement added into commercial concrete C15 through a mix proportion test, and the construction cost is greatly reduced while the overall stability and the impact resistance of the slope protection are ensured. The filling layer and the surface of the sash beam are arranged to be flush, so that the impact force of the river water coming from the front and the flowing water at the top on the slope surface can be reduced, and the service life of the structure is prolonged.

Claims (9)

1. The utility model provides a side slope protective structure, including lattice girder (4) on the side slope, characterized by, the crossbeam longeron of lattice girder is placed on the side slope of flattening, be equipped with flat bed (7) of packing in the lattice girder below side slope pit, pre-buried L type tooth wall (2) of lattice girder bottom end, curb (8) are connected to lattice girder top, the other kerbstone (9) that are equipped with cut-off ditch (9), be equipped with filling layer (3) in the lattice at lattice girder middle part, drain pipe (5) level runs through the filling layer, its inner end extends to flat bed, its outer end extends to outside the filling layer, drain pipe inner parcel has geotechnological cloth (6).

2. A slope protection structure according to claim 1, wherein said filling layer (7) is a gravel filling layer or a crushed stone filling layer.

3. The slope protection structure according to claim 1, wherein said fill level compaction factor is not less than 0.9.

4. A slope protection structure according to claim 1, wherein said filling layer (3) is a gel sand gravel-rich filling layer, said filling layer being flush with the surface of the sash beams.

5. A slope protection structure according to claim 1, wherein said drainage pipe (5) is a PVC pipe having an inner diameter of 7.5cm.

6. A slope protection structure according to claim 1, wherein the outer end of said drainage tube is lower than the inner end, and the slope is 2%.

7. A slope protection structure according to claim 1, wherein the tops of said lattice beams are integrally formed with said kerb.

8. The side slope protection structure according to claim 1, wherein said intercepting drain has a water passing area of 0.4 x 0.4m.

9. The side slope protection structure according to claim 1, wherein a mortar finishing layer with a thickness of 2cm is arranged on the bottom surface and the inner wall of the intercepting ditch.

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